The capillary reservoir technique was used to study the self-diffusion of 6Li in LiBr-KBr melts (table 23). The activation energy for the tracer diffusion of 6Li in eutectic mixtures, at temperatures ranging from 360 to 760C, was equal to 5.2kcal/mol.
M.Chemla, P.Lantelme, O.P.Mehta: Journal de Chimie Physique et de Physicochimie Biologique, 1969, October, 136-43
Table 23
Tracer Diffusion of 6Li in KBr-LiBr Melts
LiBr (%) | Temperature (C) | D (cm2/s) |
4 | 750 | 6.86 x 10-5 |
24.5 | 659 | 5.74 x 10-5 |
24.5 | 736 | 6.95 x 10-5 |
24.5 | 759 | 7.88 x 10-5 |
36 | 555 | 4.22 x 10-5 |
36 | 557 | 4.31 x 10-5 |
51.5 | 360 | 1.91 x 10-5 |
51.5 | 363 | 1.80 x 10-5 |
51.5 | 401 | 2.64 x 10-5 |
51.5 | 456 | 3.21 x 10-5 |
51.5 | 507 | 4.12 x 10-5 |
51.5 | 548 | 4.62 x 10-5 |
51.5 | 554 | 5.36 x 10-5 |
51.5 | 642 | 6.60 x 10-5 |
51.5 | 655 | 7.39 x 10-5 |
51.5 | 761 | 9.51 x 10-5 |
76 | 496 | 5.22 x 10-5 |
76 | 535 | 5.89 x 10-5 |
76 | 643 | 8.72 x 10-5 |
76 | 747 | 1.01 x 10-4 |
99 | 566 | 8.54 x 10-5 |
99 | 571 | 8.85 x 10-5 |
99 | 669 | 1.05 x 10-4 |
99 | 750 | 1.21 x 10-4 |